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<html><head><style>h1 { border-style: solid; border-width: 15px;}div { border-style: solid; border-width: 15px;}</style></head><body><h1>A heading with a 15px thick border</h1><div>A div element with a 15px thick border.</div><p><strong>Note:</strong> The border-width property does not work if it is used alone. Use the border-style property to set the border first.</p></body><!-- Mirrored from www.w3schools.com/cssref/tryit.php?filename=trycss_border-width5 by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 21 Dec 2022 17:35:57 GMT --></html>